Telephone call or ringer.



No. 787,879. PATENTED APR. 18, 1905.

O. E. EGAN.

TELEPHONE CALL OR RINGER.

APPLICATION FILED AUG.13, 1902.

UNITED STATES Patented April 18, 1905.

()l-lAltLES E. EGAN, OF DURHAM, NORTH ()AFOLINA.

TELEPHONE CALL OR RINGER.

SPECIFICATION forming part of Letters Patent No. 787,879; dated April 18, 1905.

Application filed August 13, 1902- Serial No. 119,562.

Be it known that l, (,naunus F. Euax, a citizen of the United States, residing at Durham, in the county of Durham and State of North tarolina, have invented certain new and LISP fnl Improvements in Telephone Callsor Ringers. of which the following is a specification. My invention pertains to improvements in telephone calls or ringers. the construction 1 and advantage of which will be hereinafter set forth, reference being bad to the annexed drawings, wherein Figure 1 is a perspective view ofthe ringer; Fig. 2, a diagrammatic view showing the circuits, and Fig. 3 a longitudinal sectional view of the condenser.

The object of the present invention is to provide a simple and compact ringer for telephones. especially telephones which are used in the so-called central-energy systems, in L I and wound closely about the same, one layer which a comlenser is necessarily employed in conjunction with each instrument on the line or circuit.

\l'ith the constructions now generally in use the condenser occupies a considerable space and provision has to be made for its accommodation in changing from one form or style of instrument to another-a matter sometimes ditlicnlt to accomplish on account of the lack of space. dii'liculty is obviated.

Referrii'ig to the drawings, A A denote the usual magnets that actuate the armature to which the clapperor ringer arm H is attached. The magnets are connected to and carried by a cross-bar C, said bar likewise serving as a point of attachment for the ringer as a whole to the telephone-casing. A permanent magnet i) secured to the bar C and extends over and down past the ends of the magnets and the armature, as usual. A bracket or arm E is also secured to the cross-bar, or, if desired, it may be attached directly to the plate 1), the arm extending upwardly to a point slightly above said plate 1). Attached to and carried by the upper end of said arm E is a comlenser F, which, as will bcnoted, lies close to the upper face of plate I) and occupies but little space. \\'ith condensers of the type now commonly employed in telephone-work \Vith my invention this objection or such a location would be impossible by reason of the size of the condenser. \Vith acoudenser such as will hereinafter be set forth or with one constructed as shown and described in my copending application, Serial No. 113,781, filed June 31), 1902, such arrangement is, however, possible.

The condenser shown in the accompanying drawings comprises a spool or bobbin,the core (1 of which is preferably llattened, as bestindicated in Fig. About the core there are wrapped two layers ll and l of paper which has been printed with a metallic inksuch, for instance, as wall-paper which has a socalled gilt" ligure printed thereon -striped paper beingespeciallyellicient. in both Figs.

and 3 lhave attempted to indicate the structure of the paper by the enlarged sectional views. The inner ends of the paper strips are attached by pasting or otherwise to the core being directly upon the other. The inner ends of the strips are left open, while the outer end of the strip II is connected to one of the magnets and the other strip is connected to the line. The other magnet is also included in the line, as best indicated in Fig. 2. A condenser constructed in accordance with this invention as above outlined occupies but little room. The small space requisite for its re ception is always to be had at that point in the casing where the ringer is located. Furthermore, it is advantageous to have the ringer and condenser put out as practically a unitary structure, since it obviates the necessity of handling a separate piece or element and the connecting up thereof.

Having thus described my invention, what I claim is 1. In combination with the magnets of a telephone call 'bell; a supporting member therefor; and a comlenser, independent of the magnets, secured to said supporting member.

2. in combination with the magnets of a telephone call-bell, a supporting member for said magnets: and an independent condenser supported by said member over the magnets in close proximity thereto, substantially as i and for the purposes described.

3. In combination with the magnets of a telephone call-bell; a supporting member for l to this specification in the presence of tWo subsaid magnets; an arm connected to said memscrlblng Witnesses.

ber; and a condenser formed independently i of said magnets and supported by said arm, CHARLES EGAN said condenser lying approximately parallel l/Vitnesses:

to the magnets. J. L. BACHMAN,

In testimony whereof I have signed my name H. C. WVILL. 

